org.apache.jena.sparql.expr.aggregate

Class AggCountDistinct

java.lang.Object

org.apache.jena.sparql.expr.aggregate.AggregatorBase

org.apache.jena.sparql.expr.aggregate.AggCountDistinct

All Implemented Interfaces:

Aggregator

public class AggCountDistinct
extends AggregatorBase

Constructor Summary

Constructors

Constructor and Description
AggCountDistinct()

Method Summary

Modifier and Type	Method and Description
String	asSparqlExpr(SerializationContext sCxt) Format as an (extended) SPARQL expression
Aggregator	copy(ExprList expr)
Accumulator	createAccumulator() Create an accumulator for this aggregator
boolean	equals(Aggregator other, boolean bySyntax) Consider this 'protected'
Expr	getExpr() Many aggregate use a single expression.
Node	getValueEmpty() Value if there are no groups : return null for no result
int	hashCode()
String	toPrefixString()
String	toString()

Methods inherited from class org.apache.jena.sparql.expr.aggregate.AggregatorBase

copyTransform, equals, getExprList, getName, getValue, key

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

AggCountDistinct

public AggCountDistinct()

Method Detail

copy

public Aggregator copy(ExprList expr)

asSparqlExpr

public String asSparqlExpr(SerializationContext sCxt)

Description copied from interface: Aggregator

Format as an (extended) SPARQL expression

Specified by:

asSparqlExpr in interface Aggregator

Overrides:

asSparqlExpr in class AggregatorBase

toString

public String toString()

Overrides:

toString in class AggregatorBase

toPrefixString

public String toPrefixString()

Specified by:

toPrefixString in interface Aggregator

Overrides:

toPrefixString in class AggregatorBase

getExpr

public Expr getExpr()

Description copied from class: AggregatorBase

Many aggregate use a single expression. This convenience operation gets the expression if there is exactly one.

createAccumulator

public Accumulator createAccumulator()

Description copied from interface: Aggregator

Create an accumulator for this aggregator

Specified by:

createAccumulator in interface Aggregator

Specified by:

createAccumulator in class AggregatorBase

getValueEmpty

public Node getValueEmpty()

Description copied from interface: Aggregator

Value if there are no groups : return null for no result

Specified by:

getValueEmpty in interface Aggregator

Specified by:

getValueEmpty in class AggregatorBase

hashCode

public int hashCode()

Specified by:

hashCode in interface Aggregator

Specified by:

hashCode in class AggregatorBase

equals

public boolean equals(Aggregator other,
                      boolean bySyntax)

Description copied from interface: Aggregator

Consider this 'protected'